/Engine/Source/Editor/DetailCustomizations/Public/Customizations/MathStructCustomizations.h
WeakHandlePtr Handle to the property to get the value from
template<typename NumericType> [FText](API\Runtime\Core\Internationalization\FText) OnGetValueToolTip ( [TWeakPtr](API\Runtime\Core\Templates\TWeakPtr)< [IPropertyHandle](API\Editor\PropertyEditor\IPropertyHandle) > WeakHandlePtr ) const